PERFORMANCE OPTIMIZATION FOR THE RESORPTION HEAT PUMP WITH TWO USEFUL HEATING EFFECTS

摘要

This paper shows the advantages for using the ammonia-water solution in a resorption heat pump and the importance of optimizing both the COP and the exergetic efficiency as a function of boiling pressure. The most important heating effect is realized through heat recovery from the absorber and from the resorber in order to prepare hot water. A second heating effect is obtained through heat recovery from the vapor at the outlet of the vapor generator VG; this second effect is smaller in value, but the water temperature is higher. The system with two heating effects is characterized by higher values for the exergetic efficiency. This solution answers to some practical application where two temperature levels for the heat are required. The study was performed for different function conditions for the plant.